Providing grit

(A) I always provide grit for my layers but not with any calcium in it, because the feeds have enough in them already. There?s also evidence to suggest that giving the birds extra calcium may cause hairline cracks in the eggs. Instead of calcium grit, we provide our birds with a grower-type granite grit. This stays in the gizzard once they have eaten it and helps them to digest pellets along with any green stuff they pick up in the pen.